Answer:
$800
Step-by-step explanation:
Since they are the conjugates of each (9-a and 9+a are conjugates, or with any number replacing 9) , we multiply it by (9+i)/(9+i) to get (9+i)^2/(9-i^2)=(81+2i+i^2)/(9-(-1))=(81-1+2i)/(10)=80/10+2i/10=8+i/5. Conjugates work because they make i into i^2 (-1) without any of the sneaky i's in the middle!
Answer:
r>4
Step-by-step explanation:
-3r+5<-7
-3r+5-5 <-7-5
-3r<-12
-3r/3
12/3
r>4
Her normal hourly rate is $13 an hour, her overtime is $19.50
